Leather-shaving machine



June 18, 1929.

w. A. TRAUD LEATHER 'SHAVING MACHINE will! u l NVENTOR' h zZZiam/Z Traud,

AT ORN June 18, 1929. w. A. TRAUD LEATHER smwme momma Filed April 26, 1928 5 Sh ets-Sheet 2 INVENTOR W'illzam imlul,

AT ORN June 18, 1929. w. A. TRAUD LEATHER SHAVING'MACHINE 5 Sheets-Sheet 3 Filed April 26, 1928 V INVENTOR Wi'llz'aml Traud,

June 18, 1929. w. A. TRAUD LEATHER SHAVING MACHINE Filed April 26, 1928 5 Sheets-Sheet 4 INVENTOR William AC Traucl,

ATTORN June 18, 1929. w. A. TRAUD v LEATHER SHAVING MACHINE Filed April 26, 192? 5 Sheets-Sheet 5 D A "MM; W M

ATTORNEY.

Fatented June 18, 1929.

pairs STATES WILLIAM A. TR-AUD, or N WARK, NEW JERSEY.

LEATHER-SHAVING MACHINE.

Application filed April 26, 1928. Serial No. 273,121.

This invention relates to a leather shaving machine, and has for its object to provide, in a manner as hereinafter set forth, for shaving leather in a manner whereby the resultant product will be of uniform thickness.

A further object of the invention is to provide, a machine of the class referred to with an adjustable, automatically operable mechanical weighting control means acting in a manner to constantly assure the amount of material removed from the leather to be 'of absolute uniformity and accuracy and to relieve an operator of the responsibility to gauge the material removed, under such conditions permitting of common laborers feeding the machine in lieu of highly skilled mechanics now performing such character of work in conjunction with the ordinary foot treadle, the result being an increase in production, at a reduction in the cost of maintenance. g

A further object of the invention is to pro vide, in a manner as hereinafter set forth, a machine of the class referred to including means operated from the driving mechanism of the machine for accurately and uniformly controlling the amount of material shaved from the leather.

A further object of the invention is to provide, in a manner as hereinafter set forth, a machine of the class referred to including a rotatable cylindrical cutting unit and a sharpening means for the latter in the form a grinder mechanism disposed at an inclination and acting upon the'cuttmg unit at the extreme top thereof resulting thereby into a true round unit to provide for accuracy and uniformity in cutting. It is well known that in machines of this type the cutting unit is subjected to great pressure and a horizontal deflection takes place, but by having the grinder mechanism acting at the top of the cutting unit true round is provided for the latter resulting as before stated in accurate and uni form cutting. in sharpening the cutter unit of machines now 1n general use, it is the prac tice to grind the cutting unit immediately behind the same in a horizontal plane, and as the unit is deflected or bowed the effect of a hollow grind is produced resulting in irreg ular cutting of the work. This serious obj ection, however, is overcome by positioning a grinder mechanism, in accordance with this invention, so it will act directly upon the eXf treme top of the cutting unit.

above the cutting unit, and with the abrading element of the mechanism positioned to act upon the top of and travel lengthwise with respect to the cutting unit.

A further object of the invention is to provide, in a manner as hereinafter set forth, a machine of the class referred to with a bladed flipper unit to prevent the leather or material from wrapping around the cutting unit which operates at high speed. It is quite common with a high speed rotating cutting unit to create a suction that will attract the leather or material, and should the latter be drawn into the unit great losses would develop, but this serious objection is overcome by arranging the flipper unit, in accordance with this invention, relative to the cutting unit to prevent any possibility of the leather from wrapping around the cutter unit.

A further objectof theinvention is to provide, in a manner as hereinafter set forth, a machine of the class referred to with means to enable the expeditious removal of a worn cutting unit and the substitution of a new one therefor when occasion requires.

A further object of the invention is to provide, in a manner as hereinafter set forth, a

' machine of the class referred to with a controllable means for the feed roller assembly for maintaining the feed roller thereof a predetermined given distance with respect to the cutting unit to insure the same'heft or weight of material passing from them during the operation of the machine as it is desirous at times to increase or decrease the weight of material produced which would consequcntly mean that the feed roller and cutter unit should be brought closer or further apart as condition demands, and further to compensate for'the changing of the position relative to each other due to the reduction of the diameter of the cutting unit by the grinding of the cutters or knives. p

A further object of the invention is to provide, in. a manner as hereinafter set forth, a machine of the class referred to with a sup- )ort for the leather or material as it is fed toward the cutting unit and with such support providing for the leather or material to n'iaintain itself taut as it moves toward the cuttin unit, thereby preventing the material from buckling or being in irregular form when it is acted upon by the cutting unit.

Further objects of the invention are to provide, in a manner as hereinafter set forth, a machine of the class referred towhich is comparatively simple in its construction and arrangen'ient, strong, durable, compact, automatic in its adjustment, controlling the amount of material removed from the leather in a uniform and accurate manner, expeditious and efficient in its operation, readily as sembled, and comparatively inexpensive to manufacture.

With the foregoing and other objects and advantages as it will hereinafter appear the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that chan es, variations and modifications can be resorted to which fall within the scope of the invention .as claimed.

In the drawings wherein like reference characters denote corresponding parts throughout the several views:

Figure 1 is a side elevation of a leather shaving machine in accordance with this in vention.

Figure 2 is a fragmentary view in section of the grinder mechanism.

Figure 3 is a top plan of the machine.

Figure 4 is .a front elevation,

Figure 5 is a fragmentary view in section on line 5-5 of Figure 4.

Figure 6 is a longitudinal sectional view of the machine on line 6-6 of Figure 4.

Figure 7 is a fragmentary view in section of the grinder mechanism.

Figure 8 is a fragmentary view in vertical section of the controlling mechanism for the feed assembly.

Figure 9 is a fragmentary view in plan of the driving means for the controlling mechanism.

The machine includes a supporting frame or structure comprising a pair of sides and a base ar *anged therebetween and secured thereto. The sides are indicated generally at 1, 2 and the base at 3.

As the sides are of substantially the same construction, but one will be described, as the description of one will apply to the other. Each side includes a base portion l of appropriate length having extending upwardly therefrom a front and a rear support 5, 6 respectively with the latter of greater height and width than the former. The support 5 is of substantially triangular contour and is provided at its apex with a bearing 7. The supports 5 and 6 are spaced a substantial distance from each other. The support 6 at its front inclines toward the support 5, and is formed at its upper forward corner with a forwardly directed, semi-circular extension 8.

The base portion t has an outwardly directed, right angularly extending flange extensive and flush with the front, bottom and rear edges thereof. The support is formed with an outwardly directed, right angularly disposed flange co-extensive and. flush with the front and rear edges thereof as at 10, 11. The support 6 is formed with outwardly directed, right angularly disposed flanges 12, 13 and l-l co-extensive and flush with the front, top and rear edges res pectivcly thereof. The flanges 11 and 12 at their lower ends merge into each other. The flanges 10 and 14 merge into the flange 9. The flanges 10 and 11 merge into the bearing 7. The flanges 12 and 13 merge into the extension 8.

Formed integral with the rear end of the base portion is a rearwardly directed, triangular shaped sup 'iorting aember 1". i The base portion 4; has its outer face formed with a vertical web 16 which is integral with the flange 9 and with the flanges 11 and 12 at the point of mergence therebetween.

The spacing of the supports 5, 6 provides a clearance 17 for the shaved leather as it passes from the cutting unit.

The rotatable cutting unit is driven at high speed and comprises a cylinder 18 provided with cutters or knives 19 and a pair of spindies 20 extending through. dual gang roller bearings 21 mounted in the extensions 8. The bearin 21 are retained in the extensions 8 by clamps which are detachably secured in position by cap screws 23. Each spindle projects from a bearing 21 and carries a drive pulley therefor. The arrangement for sustaining the cutting unit or cylinder facilitates the changing of such unit, as it requires changing every ten days. To remove the cut-- ting unit it is simply necessary to detach the cap screws 23 from the two clamps 22 and the unit can be readily lifted from the machine.

Positioned imn'iediately below the cylinder 18 is a wiping flipper unit including a cylinder 2-l provided with radially disposed blades The cylinder 24 is provided with a pair of spindles 26 journaled in a pair of forwardly extending, downwardly inclined. supports 27 pivotally connected to the sides 1, 2 to provide for the adjustment thereof The su 'iports 27 are each maintained in adjusted position by an adjusting screw 28 and with the screw passing through an arcuate slot 29 provided in a side 1 or 2. See Figure 1. One of the spindles 26 carries a pulley 3O driven from a driving belt 31 therefon The wiping flipper unit is for the purpose of preventing the leather or other material acted upon from wrapping around the high speed cutting unit. It is quite common for the high speed cutting unit to create a suction that will attract the leather and should the latter be drawn into the cutting unit great losses would develop. Generally, a brush has been employed at this point to eliminate this danger, but it has been very costly and not satisfactory. The flipper unit forming a part of this machine has the cylinder 24 thereof of solid steel having preferably four blades 25 fixed, caulked or tamped into it. The adjustable bearing supporting means referred to for the cylinder 24 is readily adjustable from the outside and accurately to the cutting unit circumference line and a close adjustment to the cutting unit.

The grinder mechanism for the cutting unit includes an abrading disc 32 which operates on the top of the cutting unit and bodily travels, while rotating, lengthwise with respect to the cutting unit alternately in opposite directions. The abrading disc is also bodily shiftable toward the cutting unit and is fixed to a rotatable roller bearing 32'. mounted on a shaft 33 fixed in the lower ends of the sides 34 of an adjustable carrier 34 which inclines downwardly toward the cutting unit.

The carrier 34 is slidably connected to the downwardly inclined top 35 of carriage 36 which alternately travels in opposite directions transversely with respect to the machine. The carrier 34 is manually adjus able for the purpose of shifting the abrading disc to and from the cutting element and for such purpose the top 35 of the carriage is provided with an upstanding fixed lug 37 which projects through an opening 38 formed in the carrier 34. Threadedly engaging with and extending through the lug 37 is an inclined adjusting screw 39 which is carried by a rear extension 40 on the hub 41 of a bevel gear 42. The hub 41 is secured to the carrier 34. Meshing with the gear 42 is a bevel pinion 43 carried by a shaft 44 journaled in and projecting outwardly from one of the sides of the carrier 34. The outer end of the shaft 44 is provided with a hand wheel 4. Carried by the roller bearing 82 is a pulley 46, driven from a twisted belt 47 operated from a band pulley 48 mounted on a shaft 49 supported from the supports 6 The shaft 49 is driven from a belt 50 operating "a pulley 51 fixed to shaft 49.

Coupling the sides 1, 2 together, as well as secured to and upon the tops of the supports 6. a track forming member 52 for the carriage Holdfast devices 53 are employed for securing the member 52 in position.

The shaft 33 is removably connected in any suitable manner to the sides 34 of the carrier 34 to permit of expeditiously removing the shaft to enable the substitution of a new abrading disc when occasion requires.

Eotatably supported in the ends of member as well projecting therefrom. is a shifting screw rod for the carriage 86. Mounted on the-screw 54 is an internally threaded sleeve 55 formed with an upwardly disposed lug 56 which extends into a socket 57 formed in the carriage 36. See Figures 1, 2, 6 and 7. The carriage 36 has a pair of depencing bifurcated arms 58 between which is positioned the sleeve 55 and through which extends the rod 54. of the rod 54 alternately in opposite directions and which in turn will carry the carriage therewith, and as the latter is shiftedthe' carrier 34 and abrading disc 32 will also be shifted in the same direction as the carriage 36. As the carrier shifts with the carriage the abrading disc will travel, while rotating, lengthwise of the cutting unit. Suitable bearings 59 are provided for the red One end of the rod 54 carries a stop collar 60. The rod 54 has a non-threaded end por tion 61 which is opposite the end carrying the collar 60. Secured to the end portion 61 is a gear wheel62 which is spaced from a bearing 59 by a collar The end portion 61 has fixed thereto, the extended hub 64 of the gear 62. The gear 62 is positioned adjacent the side 2 of the supporting structure or frame of the machine. I

The top of the support 6 of the side 2, is cut away to provide a clearance 64 and secured with said support 6, on the inner side thereof and spaced from, but in alipunnentwith the clearance 64 is a bearing bracket 65. flee 'Figure 2. Mounted in the clearance 64 is a bearing 66 forming a part of bracket 65. Ex tending hrough thebraclret 65 and bearing 66 and also projecting outwardly from the side 2 is a transmission shaft 67 for the screw rod 54.

Positioned against the bearing 66 and mounted on shaft 67 is the extended hub 68 of a driving pulley 69. Keyed to shaft 67 is the pulley 69 which drives the shaft 67. Loosely mounted at both sides of the pulley 69 is an idler pulley. One of the idler pulleys is indicated at 7 O and is loosely mounted on shaft 67 between pulley 69 and bracket 65. The other idler pulley is indicated at 71 and is loosely mounted on the hub 68 between pulley 69 and bearing 66.

Theouter end of shaft 67 carries a pinion 72 meshing with gear 62 on'screw rod 54 for the purpose of rotating it.

The pulley 69 is alternately driven in a clock-wise and in an anti-clock-wise direction, to provide for the'alternate travelling of the carriage 36 in opposite directions, and for such purpose an automatically adjustable operating means is provided. The said means includes a one-piece shifting member 73 for a pair of driving belts 74, 75 which are provided for operating the pulley 69. The belt 75 is twisted for the purpose of driving the pulley 69 in an opposite direction to that in which it is driven by the belt 74.

The member 73 comprises a body portion 76 The sleeve 55 is movable lengthwise provided at its top with a yoke 77 and at one side of its lower end with a yoke 78. The yolre 77 has the belt 7 4c pass therethrough and is employed for shifting the belt 7 1, onto and oil of the pulley 69 from pulley 71. The yoke 78 is used for shifting the belt onto and oil of the pulley 69 from pulley 70. The belts 7-1 and 75 are alternately mounted on pulley 69, and. when a belt is positioned thereon it is latched in driving position with respect thereto until the carriage 36 reaches the limit 01 its travel in one direction.

The member 73 has its body portion 76 ii edly secured by holdlast devices 7 8 to near one end of a latchable spring controlled shitting bar 79 for the said member 73. The bar 79 projects through opposed slots 80 formed in the supports 6 below the top thereof. See Figure 6. One end of the bar 79 has its bottom edge formed with a set of notches or teeth 81. See Figure 2.

Secured to the outer face of the support 6 of side 2 is a pivoted coiinter-balanced latching; member 82 which. extends across the slot 80 in side 2 and also in the path 01 the notched end of the bar 79.

Depending from the carriage 36 and straddlin the bar 79 is a stop lever 83 which slides lengthwise of the bar to engage resilient stops mounted thereon. The stops are indicated at 84-, 85. When the stops are engaged by the lever 83 the bar 79 is shifted carrying the belt shitting member 73 therewith. W hen the lever 83 engages stop 84: the bar 79 is moved toward side 2 to shift member 73 in a direction to move belt 7 1 from oil of pulley 69 and belt 75 onto the latter. As bar 79 passes through side 2 the latching member 82 carried by the latter will coact with a. notch of bar 79 and latch. it in position whereby belt 75 will be held to drive pulley 69. V] hen the lever 03 engages stop 85 the bar 79 will be released from such notch and be moved in a direction toward side 1 and when moving in such direction it will carry member 73 therewith, whereby the belt 75 will be shifted oil pulley 69 and belt 7 a onto the pulley. As bar 79 moves through side 1, the latching member 82 carried by side 2 will coact with another notch or bar 79 and latch it in position whereby belt 7 1 will be held to drive pulley 69. The steps 84;, 85 are in the term of coil spri nus and are mounted on bar 79. The stops are adjustable and alternately act to assist in re leasii'ig the bar 79 from the latching nien1- ber 82.

The main operating sh aft of the machine is indicated at 86 and is provided with a drivin g and an idler pulley 87, 88 respectively. Supported by the shaft 86 and driven thereby are a grooved pulley 89, a band pulley 90, a sprocket pinion 91, a pulley 92 and a pair of driving pulleys 93, 94. The pulley 93 is secured on the sh aft 86 at one end and the pulley 9d at the other end thereof. The pulleys 87, 88, 89, 90 and 92 and sprocket pinion 91 are rranged on the shalt 86 between the sup- Driven from the sprocket pinion 91 is a cog chain. 96 for a purpose to be presently re ferred to. Driven from the pulley 92 is the belt 50. Driven from the pulley 93 is a belt 97 and driven from the pulley 94 is a belt 98. Each of the spindles 23 of the cutting unit carries a driven pulley there'lor. T hose pulle s are indicated at 99 and 100. The belt 97 is provided for driving the pulley 99 and the E r-alley 100 is driven trom belt pulleys 99 and 100 are of materially less diameter than the pulleys 93, 9 1; whereby the cutting unit is driven at high speed.

Positioned between and supported upon the supports is a pivoted, spring controlled, supporting element or carrier of skeleton ii'orin comprisinga top bar 101, a pair of side bars 102, 108, a V-shaped bottom bar 10 1 ant a vertically disposed central bar of channel shaped cross section. The bar 105 is in tegral at its top with bar 101, intersects centrally and is integral with bar 104 and depends below the latter. The lower end 01 bar 105 is bifurcated as at 106. The bar 105 in proximity to its upper end is formed with laterally disposed, oppositely extending lugs 107, 108. The front of bar 105 is slotted as at 109 and at each side of the latter an outwardly extending bearing bracket 110 is secured to the front or bar 105. Swivelled to the brackets 110 and positioned outwardly of I bar 105 is a nut 111 through which extends an adjusting screw 11 for purpose to be presently referred to. The screw 112 has a hand wheel 113.

The bar 105 above the slot 109 has extendin therethrough a pivot shalt 11 1 which is mounted in the bearings 7 at the upper ends of the supports 5. See Figure 1. The bar 102 on its outer side carries a spacing sleeve 115 which abuts the inner em 01 one ot the supports 5. The bar 103'has projecting from its outer side a spacing collar 116 oi less length than the sleeve 115 and u'hich'abuts the inner face of the other sluiport 5. The bar 103 has extending from its inner side a spacing col lar 117. Clamped to the shaft 11d is a pair of sectional bands or cellars 118, 119 provided with inwardly extending lateral lugs 120, 121 respectively. The band 118 abuts the inner side of bar 102 and the band 119 abuts the collar 117. The shaft 114 extends through the side bars 102, 103, sleeve115 and collars 116,117.

The

- tour thereto is a cap member 129.

element.

Mounted on the shaft 114 is a pair of controlling springs for the pivoted supporting One of the springs is indicated at 123 and has one end abut the lug 107 and its other end abut the lug 120. The other of the springs is indicated at 124 and has one end abut the lug 121 and its other end the lug 108. The springs 123 and 124 are arranged on opposite sides of the bar 105.

Mounted upon and secured to the bar 101 is a support comprising a base 125 and a pair of upstanding end pieces 126, 127 which have the upper portions thereof directed outwardly. The

is formed on the base 125 which provide bearings for a counter shaft 129 which extends through the end piece 126. The top of the end pieces 126, 127 are rounded and the edge thereof is beveled. Secured to the top of the end piece 127 and conforming in con- Secured to the top of the end piece 126, conforming in contour thereto and projecting outwardly i therefrom is a guard and cap member 130 of greater width than the member 129.

Positioned between the endpieces 126, 127 is a solid combined pressure exerting and feed roller 131 having spindles 132 journaled in the end pieces and one of which etxends through and projects laterally from the end piece 126. Arranged between the end pieces 126, 127, outwardly with respect to andabove the top of the feed roller 131 is a rotatable feed cylinder or roller 133 of greater diameter than that of the roller 131. The cylinder 133 is mounted on a shaft 134 which is journaled in the end pieces 126, 127 and projects laterally from the end piece 126. The roller 131 is spaced from the cylinder 133 and arranged between the upper portions of roller 131 and cylinder 133 is a guide bridge 135 inclining downwardly toward the roller 131 and over which passes the material.

Opposing the outer face of each of the end pieces 126, 127 is a shiftable support 127. See Figure 5. Each support has a stub shaft 12 adjust-ably mounted in an end piece and maintained in adjusted position by a set screw 136. Each support has extended laterally therefrom a shaft 136 for loosely supporting a holder member. One holder memher is indicated at 137 and the other at 138. The members 137 and 138 are closed at their outer ends and member 137 is of greater length than member 138. The diameter of the holder members is greater than roller 131 or feed cylinder 133. The purpose of the holder members will be presently referred to. The shiftable supports 127 provide for adjusting the position of the holder members with respectto cylinder 133.

The feed roller 131 projects beyond the inner sides of the end pieces 126, 127 and the top of the feed cylinder 133 is in alignment base 125 is of less length than bar 101. A pair of spaced vertical lugs 128 driven by a gear with the members 129, 130 and normally with the top of the holder members 137, 138.

lVith reference to Figure 5 the shaft 129 has its outer end provided with a'sprocket gear 139 and a pinion 140. Supported by the end piece 126 is a stub shaft 141 which supports a gear 142 meshing with pinion and driven therefrom. Carried by a spindle 132 is a pinion 143 which is driven fromgear 142. Carried by shaft 134 is a gear 144 driven from gear 142.

For advancing the feed roller toward the cutting unit and for maintaining such roller in constant pie-determined spaced relation with respect to the cutting unit there is associated with the bar 105 anarm 145 which is arranged within and depends from the bar 105. See Figure 8. The arm 145 has its lower portion 146 enlarged and forked as at 147 for the reception of a sliding bearing 148 for a crank pin 149 carried by a rotatable disc 150. The lower end of the furcation in arm 145 is closed by a plate 151 whereby the bearing 148 is confined in said arm 145. The arm 145 is mounted on a pivot member 152 whichjis secured in the lower end of arm 105.

The upper end of arm 145 is formed with a slot 153 for the passage of the adjusting screw 112. Carried 0n the rearend of screw 112 is a curved abutment 154 whlch provides means for toggling the screw with arm 145. The

bearing 148 provides a positive drive for arm 145 .which in turn shifts the feed assembly toward and from the cutting unit.

The disc is driven by a shaft 155 which carries alarge gear wheel 156 operated from a pinion 157 mounted in a shaft 158 arranged rearwardly of shaft 158 and supported on the base 3; The shaft158 is of greater length than shaft 155 and carries a sprocket pinion 159 operated by achain 160 driven from a sprocket pinion 161 secured to a shaft 162 supported on the base 3. The shaft 162 is 163 operated from a pinion 164 carried by a shaft 165 provided with a sprocket pinion 166 driven from the chain 96.

slidably keyed on shaft 158 is a conoidal shaped shifting member 167 which acts upon a clutching device 168 slidably keyed to shaft 158. The device 168 is provided for clutching the pinion 159 in a manner to provide for its operation from the shaft 158, thereby driving gear 156.

The-member 167 is shifted by a yoke 170 carried by a rock shaft 171 journaled in a casting 171 supported by the base 3. The shaft 171 projects outwardly from the front of base 3 and is provided with a spring controlled foot pedal 172.

Carried by the shaft 171 is an upstanding curved arm 173 having at its upper end a stub shaft 174 provided with a r0ller17 5 for riding against one face 176 of a cam 17 7 mounted on the shaft 155. The face 176 is formed with a pair of diametrically disposed 191 at its other end.

concavities 17 6 in one of which is normally seated the roller 175. Bearings 178 are provided for shaft between disc 150 and cam 177, the latter being fixed to shaft 155.

hen the foot pedal 172 is depressed the yoke moves in a direction to provide for the device 168 to clutch the pinion 157 thereto whereby the latter is driven from shaft 158 and operates the gear 156. When the pedal 1.7 2 is depressed the arm 17 3 is carried therewith which shifts the roller clear of a recess 176. When the operator releases the pedal it cannot shift to normal position un til the roller 175 reaches the other recess 176 as the roller is travelling against that part of face 176 of cam 177 leading from the first to the other recess, and this arrangement maintains pinion 157 in clutched position with respect to shaft 158. When the roller 175 reaches the other recess 176 the pedal will then be automatically restored to normal position whereby pinion 157 is unclutched and the operation of disc 150 is discontinued, until pedal is depressed by operator to release seated roller 175 The seating of roller 175 occurs twice on one revolution of cam 177.

Loose on the shaft 158 is a sprocket pinion 179 having attached to the hub thereof a clutching member 180 provided with a re silicnt clutching face preferably formed of leather. S'lidably keyed to shaft 158 is a clutching member 181 opposing member 180 and also having a resilient clutching face preferably of leather.

The member 181 has a hub which opposes a revoluble cam sleeve 182 having a beveled end coacting with the beveled end of a sta tionary cam sleeve 183 to apply horizontal pressure to member 181 so it will coaet with member 180 to clutch pinion 179 to shaft 158. Extending from sprocket pinion 179 to gear 139 is a chain drive 17 9 for the latter and which is operated while the parts are clutc ied, even though disc 150 is idle.

Sleeve 182 is formed with a crank arm 184 having an apertured lateral extension 185 head 187 formed on the extending part 188 of the pivot 152 for the arm 145. Carried by the rod 186 is an adjustable stop collar 189. The rod 186 has a nut 190 at one end and a nut The rod 186 inclines downwardly from part 188 to the crank arm 184.

Inter-posed between head 187 and nut 190 and mounted on rod 186 is an adjustable coiled. tension spring 192 and interposed between collar 189 and part 188 and mounted on rod 186 is an adjustable coiled tension spring 193.

With respect to the function of the arm 145, the slidable bearing 148 carried thereby on the operation of disc 150 will be whirled in the pitch or center line circle of crank pin 148 thereby producing a rocker motion hinging at 114 and delivering the required action at the point of feed roller 181. lVhen the machine is open for loading the feed'roller 181 lies about two inches back from the cutting cylinder and after the leather is placed on the feed roller the operator trips the pedal 172 and this produces an action to advance the feed roller 131 toward the cutting cylinder. This movement of the feed roller 131 toward the cutting cylinder is positive and accurate and further the feed roller is always brought to the very same stopping place at each movement of the power clutch.

As the cutting cylinder is constantly being sharpened or ground it diminishes iii size when in constant use, therefore provision must be made for this wear, since it is essential to maintain the relative position of the feed roller towards the cutting cylinder, as it is necessary to maintain a given distance between the two elements to insure the same heft or weight of material passing from them at all times. Also it is desirable at times to increase or decrease the weight of material produced which would consequently mean that the feed roller and cutting cylinder should be brought closer or further apart as the conditions demand so for this reason, as well as for the compensation of the changing position of such elements, due to the reduction of the cutting cylinder effected in grinding it is necessary to produce a variable set adjustment with respect to the arm 145.

A secondary toggling connection is provided at the point of the pivot connection between bar 105 and arm 145 carrying a leverage from crank pin 149 to the point aforesaid, as well as compensating leverage to the adjusting screw 112 by the swiveled nut 111 which i'inds a ball seat, by the abutment 154 in the arm 145 at the slot 153. When the ad justing screw 112 is turned either way it changes the position of the center of pivot 152 regardless of the crank movement provided by the disc 150 and by changing the position of the center of pivot 152 in either direction, the opposite action is produced at feed roller 181.

Since it is true that pin 149 is limited in its throw or movement, it is clearly obvious that the feed roller at the opposite end would move in harmony with this limitation, but owing to the adjustment referred to it is possible to vary the extent of the range the plane in which the feed roller 181 performs its limited movement produced positively and aecurately by the crank disc at the lower end of the machine.

It will be assumed that the feed roller 181 moves back and forth as the machine is opened and closed, the movement being approximately one and three-quarter inches and positive not permitting any alteration in this one and-three-quarter limit. But it will be necessary to have this range of movement maintain its relative position to the cutting cylinder, even though the diameter of the latter is being reduced by the grinder and tending to open the gap between the roller 131 andcutting cylinder, so the only alternative is to advance the entire plane or range in which the limited one and three-quarter movement occurs and this functioning is produced by the adjustment'unit referred to in the ireceding paragraph.

Relative to the feed assembly it is neces sary to start the d iven elements just about the time the machine is to close and to stop the operation of said elements, i. e., feed roller and feed cylinder, after the machine begins to open and which operation is attained by the clutching members 180, 181 and sleeves 182, 183 controlled in positive accord with the motion of the adjustable toggle pin or pivot 152. The action being on the revolving of sleeve 182 in one direction, it will coact with sleeve 183:3 and horizontal pressure will be exerted thereby on the member 181 which in turn will clutch sleeve 180 therewith providing for the operation of the sprocket pinion 17 9 and the driven elenients of the feed assembly. On a reverse movement of sleeve 182, sprocket pinion 179 will become unclutched from shaft 158 under such conditions that operation of the driven elements of the feed assembly will be discontinued. The sprocket pinion 179 is clutched to shaft 178 when the machine starts to close and unclutched therefrom when it starts to open.

The feed assembly is constructed and 'ar- *anged to overcome rebound, vibration and,

to no its turning without chattering. Suitable forms of gears are employed to eliminate he chatter generally generated by the/meshing of gears. To overcome chattering and vibration of the driven elements of the feed assembly when advancing the same from free neutral position to the cutting cylinder, especially when considering that such clcmeats advance to the cutting operation and that at the point of closing a terri tie pressure is thrown against them which pressure comes in the nature of a blow creating a rebound and thus gouging and destroying the stock, a unit of spring resisting pressure is employed which causes the feed roller assembly to ad vance to the cutting cylinder under resistance great enough to compensate the impact pressure of cutting cylinder against feed roller.

The resistin unit as referred to in the preceding para iph eliminates all chattering and rebound objections and. it is formed from the coiled springs 128 and 12 1- mounted in the manner aforesaid with respect to the shaft 11 lugs 107, 108 and pins 120, 121. The shaft 11 1 is stationary. 118, 119 are adjustable to increase or decrease t m tension of springs 123, 121, and these lat- The bands or collars ter act to create the resistance necessary when the feed roller advances toward the cutting cylinder.

Connected to the bar 101 are spaced outnnrdl extending supports 19a to which is attached. va handle member 195 having the ends thereof inturned and projecting laterally from the supports 19%. T he leather is guided by the handle bar as it advances toward the cutting element and the handle further provides means to enable the operator to grasp the stock around it to curb or retard the advancement of the stock to the cutting cylinder,

Supported. in spaced. bearings 196 at the side 2 is a downwardly inclined rotatable operating shaft 107 for a power transmission belt shifting device. The belt is not shown and is employed for driving the fast pulley S7. The upper end of shaft 197 has a hand wheel 198 and its lower end carries a pinion 199 which meshes with a rack 200 provided on a reciproca'tory' bar 201 supported in brackets 202, 203 secured to therear of the sides 1, Extended rearwardly from the bar 201 is a pair of spaced rods 20 1 between which is adapted to pass the power transmismarten. The rods 20% provide for the shifting of the trznismission belt from the loose pulley 88 onto and oil of the driving pulley 87, to control the operation of the shaft 86.

The controlling spring for the foot tread 172 is indicated at 205 and is attached thereto and to a support 194-.

The holder members 137, 138 permit of the material to hang therefrom as it advances toward the feed roller whereby the horizontal weight oft-he material, as the latter hangs from the members 187, 138 will maintain the material, as it advances to feed rollers taut in horizontal and lateral directionsdelivering a firm, stretched out portion for action thereon by the cutting cylinder resulting in a uniform cut.

The support formed by the base 125 and end pieces 120, 127 1s detachably and adjustably "secured to the bar 101, and for such purpose releasable connecting screws 194 and a swivel pin 195 are employed. The screws 19 1 extend down through the base 125 into the bar 101 for securing base 125 in its adjusted position. The pin 195 is loosely mounted in the opposed faces of base 125 and bar 101. For purpose of adj Listing base 125 relative to bar 101 so that the feed assembly will be posiioned in true lateral or horizontal alignment with respect to the cutting cylinder, set screws 190are provided which'abut against base 125 to adjust it to the desired position. The set scr ws 1% are mounted in upwardly extending anchoring posts 197 which project from the bar 101.

Carried by the side 2 is a tensioining device 198 for the chain drive 179. i

The operation of certain elements of thefc d assembly, wil nowibe specifically referred to and which are the feed roller 131, feed cylinder 133, guide bridge 135 and hold er members 137, 138. The feed or bed roller 131 rotates towards the cutting cylinder and when the material is placed on such roller the action of the latter is to feed the material to the cutting cylinder. The relative position of roller- 131 to the cutting cylinder is the means of gauging the weight of material passing between it and the cutting cylinder and consequently roller 131 may be termed a gauge roller. The closer the roller 131 is set to the cutting cylinder, the more material will be shaved or reduced after p2 ssing from the cutting cylinder. Feed cylinder 133 is in a sense a check roll travelling at a slower speed than roller 131, but in the same direction.

The material when positioned for feeding, rests on rollers 131 and 133. The roller 131 travels at a little greater speed than roller 133 and governs the foot per minute feed speed of the stock entering the machine. If the pressure of the operators hands is exerted on roller 133 it will check the speed of the material to the speed of roller 133 and consequently roller 131 no longer controls the speed of material passing to the cutting cylinder. A more simplified example of the relative action between these rollers is that the bed roller 131 is the primary feed control, while roller 133 is a follow up roll at a considerably slower speed, and should the operator wish to check the speed of material advancing to cutting cylinder, say at the right hand side he will simply grab the roller 133 with the right hand immediately clamping the material to this roller and reducing the speed of the stock at the right hand side of the machine to the speed of roller 133 where it was travelling at the propelled speed of roller 131. This would allow the material at the left side of the machine to flow faster to the cutting unit than the material at the right hand side. The operator therefore can retard the flow of the material on one side and then at the other side as is desired. The guide bridge 135 covers the a between the rollers 131 and. 133.

Further in connection with the work per formed by roller 133, the operator constantly grips this roller with material between the hands and surface of roller when feeding the machine, which he does to hold the material taut between the two rollers and when he wishes to curb the advancing speed of mat rial, as explained above, he simply grips the roller a little tighter with either hand, depending entirely on which side he wishes to re tar-d the advancement of the stock, and the ti ghtcr he grips the nearer he brings the speed of the advancing stock to the circumference of roller 133 which of course, as before stated, is considerably slower than that of roller 131.

The holder members 137 and 138 referred to as combined supporting and suspending elen'ients may also be termed end guard rollers that revolve freely to turn forward or backward in either direction, and are spherical or globular at the outer end, and which function first as revolving guards, guarding a train of gear and sprockets at one side of the machine, and next assist the material to flow in accordance with the material flowing over rollers 131 and 133. These end guard rollers are spherical. at the outer ends and help to keep the material taut across the rollers 131, 133 as well as protect the material from clinging on sharp abrupt corners that might be evident on the holder casting which supports rollers 131 and 133. These holder members are adjustable in an eccentric plane and can be set up or down or from or toward the machine, allowing themselves to be adjusted to the most accessible position. The members 137 and 133 further act to suspend that portion of the material not acted upon during the flow or feed of the material to the cutting cylinder, whereby the weight of such portion will maintain it taut.

The base 125 for the rollers 131 and 133 is adjustably mounted on the top bar 101 of the skeleton supporting element or carrier, as it is essential. that the roller 131 at times be set closer at one side than at the other to the cutting cylinder. This arrangement provides a means to allow such variation for the purpose of reducing the material to a greater extent on one side than on the other. The pin 1.95 provides a joint at the center of the base. 125 thereby allowing the ends of the latter to move toward or from the cutting cylinder as desired. The set screws 196 are provided to assist in moving the support forward or backward on either side. The handle member 195 maintains the stock clear of the front of the machine on the feeding of the stock to the cutting cylinder.

11: is thought that the many advantages of a leather shaving machine in accordance with this invention canv be readily understood, and although the preform-id embodiment of the invention is as illustrated and described, yet it is to be understood that changes in the de tails of construction. can be had which fall within. the scope of the invention as claimed.

l /hat 1 claim is:

1. In a leather shaving machine having a cutting cylinder, a pivotally supported feed assembly adapted to be moved towards and from said cylinder and including feed roller, a feed cylinder positioned'outwardly with respect to and extending above the feed roller, revoluble combined supporting and suspend ing elements for the material being fed, spaced from the ends of the feed cylinder and aligning with the top of the latter, cap'members positioned between said elements and feed cylinder, and an adjustable, swivelly mounted base common to said roller, feed cylinder, elements and members.

2. In a leather shaving machine, a supporting structure, afeed assembly at and positioned above tlie'top of the front of said structure, an oscillatory carrier for said as- 's'en' hly, said carrierpivotally supported on saidstructure at tlie top of the front of the latter, a cutting unit mounted in said structure i'eai'wardl y of said assembly, a main driving element "at the rear of said structure, a transmission and speed reducing element within said structure approxi mately centrally thereof and driven from said element, a combin'ed controlling and opera ting mechanism for said carr er and assembly, said mechanism positioned within said structure at the front thereof, operated from said transmission, pivot'ally and adjustably connectedto said car rier and having a driving connection for said assembly, and means positioned eXteriorly of said structure and driven from said main driving element for operating said cutting 3. In a leather shaving machinehaving a cutting-unit, carrier for bodily moving a leather feed mechanism towards and from said unit, said carrier pivotally supported intermediate its ends, an oscillatory element for shifting said carrier, said element extending into and pivotally supported intermediate its ends froin the lower end of said carrier, means for adjustably connecting the upper eiid'of said element to said carrier, a slidiiig bearing mounted in the lower endof said element, and an intermittently operable rotatable means provided with an ec'centrically disposed pin mounted in said bearing to provide for the oscillation of said element to shift the carrier towards and from the cutting unit. v

l. In aleather shaving machine having a cutting unit, a pivot shaft, supporting means therefor, a leather feed mechanism carrier pivotally mounted intermediate its ends on said sliaft,resilient means mounted on said shaft and bearing against said carrier and said supporting means, an oscillatory element for shifting said carrier towards and from the cutting unit, said element extending into said carrier and pivotally supported in-' terine'diate its ends from the lower end of the 7 carrier, means connected with the carrier and extended throughthe upper end of said element; for connecting the carrier and element together, a sliding bearing mounted in the lower end of said element, and an intermit-,

teiitly operable rotatable means provided with an eccentrically disposed pin mounted in said bearing to provide for the oscillation of said element to, shift the carrier towards and from the cutting unit.

5, In a leather shaving machine having a cutting unit, the combination of ale'ather feed mechanism, a carrier therefor pivotally supported intermediate its ends, an oscillati' ry element for shiftii'ig the carrier with said feeding mechanism thereon towards and frointhe cutting unit, said oscillatory element extending into said carrier, means for pivotally supporting the oscillatory element, intermediate its ends from the lower end of said carrier, means for connecting the upper end of said element to said carrier, and means slidabl y engaging the lower end of said elecutting unit, a pivotally supported, material fedasseilibly adapted t be bodily moved ards and from the cutting unit, said feed assembly including i'ev'oluble, spaced, aligning,

eonibined supporting and suspending elen ents for that portion of the material not actedupon during the feed of the material to the cutting unit whereby the weight of such pbrtion will maintain it taut, and each of said elements being ofcylindrical form and having a rounded outer end.

8. In a leather shaving machine having a 'eiittiiig unit, carrier for bodily shifting a stock feeding mechanism towards and from the cutting unit, means for pivotally supporting said carrier intermediate its ends, a shiftiiig element for the carrier pivotally supported intermediate its ends upon one extremity of the latter, means for connecting one extremity of said element to the carrier, and

means connected with the other extremity of said element for shifting it whereby the carrier is moved towards and from the cutting unit. v

I In a leather shaving machinehaving a cutting unit,a feed roller, a feed cylinder positioiied outwardly with respect to and extending above the feed roller,revoluble material holder members spaced from the ends of the feed cylinder and aligning with the topthere f, cap members positionedbetween sai'd holder members and feed cylinder, supports for the cap members, and an oscillatory,

carrier ceinmon to said roller, cylinder, members and supports and movable towards and from the cutting unit.

10- In a. leather shaving machine having a cutting unit, a feed roller, a feed cylinder positioned outwardly with respect to and ex te'n'diiig above the feed roller, revoluble material holder members spaced from the ends of the feed cylinder and aligning with the top thereof and having rounded outer ends, cap

members positioned between said holderinenihers and feed cylinder, supports for the cap members, an oscillatory carrier for moving towards and from said unit and common to said roller, members and supports.

11. In a leather shaving machine having a cutting unit, a feed roller, a feed cylinder positioned outwardly with respect to and extending above the feed roller, a revoluble material. holder members spaced from the ends of the feed cylinder and aligning with the top thereof and having rounded outer ends, cap members positioned between said holder members and feed cylinder, supports for the cap members, an oscillatory carrier movable towards and from the cutting unit and common to said roller, members and supports, a'pivot shaft for said carrier positioned intermediate the ends thereof, and tensioning springs for the carrier mounted on said shaft.

12 In a machine for the purpose set forth having a cutting unit, a feed roller, a feed cylinder positioned outwardly with respect to said roller, revoluble, cylindrical'holder members spaced from the ends of the feed cylinder, aligning with the top thereof and each having a rounded outer end, cap members positioned between said holder members and feed cylinder, supports for the cap mem bers, a driven shaft for said feed cylinder, a driven shaft for said feed roller, said shafts mounted in said supports, a stationary shaft for said holder members adjustably connected with said supports, and an oscillatory carrier movable towards and from said unit and common to said roller, cylinder and supports. 7

2 In a machine for the purpose set forth having a cutting unit, a feed roller, a feed cylinder positioned outwardly with respect to said roller, revoluble, cylindrical holder members spaced from the ends of the feed cylinder, aligning with the top thereof and each having a rounded outer end, cap members positoned between said holder members and feed cylinder, supports for the cap members, a driven shaft for said feed cylinder, a driven shaft for said feed roller, said shafts mounted in said supports,

a stationary'shaft for said holder members adjustably connected with said supports, an

oscillatory carrier movable towards and from said unit and common to said roller, cylinder and supports, a'pivot shaft for said carrier positioned intermediate the ends of the latter, and tensioning springs mounted on the pivot shaft and engaging saidcarrier.

14E. Ina leather shaving machine having a cutting unit, a feed roller, a feed cylinder positioned outwardly with respect to and eX- tending above the feed roller, revoluble holder members spaced from theends of the feed cylinder and aligning with the top of the latter, cap members positioned between said holder members and feed cylinder, supports for the cap members, a guide bridge positioned between said roller and cylinder, and

an oscillatory carrier common to and bodily a cutting unit, a feed roller, a feed cylinder positioned outwardly with respect to and extending above the feed roller, revoluble material holder members spaced from the ends of the feed cylinder and aligning with the top of the latter, said members positioned between said holder members and feed cylinder, supports for the cap members, driven shafts for said roller and feed cylinder and carried by said supports, shafts for said holder members adjustably connected with said supports, a carrier common to said roller, feed cylinder, members and supports for bodily carrying the same, means for shiftin the carrier towards or from said unit, and means for operatingsaid driven shafts'solely when the carrier moves towards the cutting cylinder.

16. In a leather shaving machine having a cutting unit, a combined controlling and shifting mechanism for moving a leather feeding means towards and from said unit, said mechanism including a carrier for said feeding means, an oscillatory arm, a pivot connecting said arm and carrier, and means for connecting the arm to said carrier to provide for varying the angular relationv between the carrier and arm around the pivot for the latterto control the limit of the shift of the feeding means to active position with respect to the cutting unit.

17 In a leather shaving machine having feeding means to active positionwith respect to the cutting unit, and a revoluble driving means for oscillating said arm to shift the carrier to and from the cutting unit.

18: In a leather shaving machine having a cutting unit, a combined controlling and shifting mechanism for moving a leather feeding means to and from said unit, said mechanism including a pivoted carrier for bodily moving said means, an oscillatory arm,

a pivot connecting said arm and carrier, means for adjustably connecting said arm to the carrier to provide for varying the angular relation between the carrier and arm around the pivot of the latter to control the limit of the shift of the carrier towards the cutting unit, a reciprocatory bearing mounted in said arm, a rotatable disc positioned adjacent said arm and carrying an eccentrically disposed pin seated in the bearing to provide for the oscillation of the arm to shift the carrier to move the leather feeding means towards and from the cutting unit, and means for intermittently operating said disc.

19. In a. leather shaving machine having a cutting unit, material feeding elements, a pivotally supported carrier for said feeding elements, an oscillatory arm, a pivot connecting said arm and carrier, means for adjustably connecting said arm to said carrier, a reciprocatory element confined in said arm and carrying a crank pin, intermittently 0perable means permanently connected to said pin for operating said arm thereby shifting the carrier to move the feeding elements towards and from said umt, and means controlled from said oscillatory arm for intermittently operating said material feeding elements.

20. In a leather shaving machine having a cutting unit, means adapted to be positioned in advance of said cutting unit and providing for maintaining the stock to be acted upon taut When advanced to said unit, said means consisting of a pair of spaced, oppositely disposed, revolubly mounted cylindrical'elements each having the outer end thereof rounded, and adjusting means to provide for selectively adjusting said elements.

In testimony whereof, I affix my signature hereto.

WILLIAM -A. TRAUD. 

